<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JS 事件机制</title>
    <style>
    #parent{
        width:200px;
        height:200px;
        background-color: red;
    }
    #child{
        width:100px;
        height:100px;
        background-color: blue;
    }
    </style>
</head>
<body onclick="alert('橘子')">
    <div id="parent">
        <div id="child"></div>
    </div>
    <script>
    // document.getElementById('parent').addEventListener('click',function(){
    //     console.log('parent click');
    // },true)
    // document.getElementById('child').addEventListener('click',function(){
    //     console.log('child click');
    // },true)
    document.getElementById('parent').addEventListener('click',function(){
        console.log('parent click');
    },false)
    document.getElementById('child').addEventListener('click',function(event){
        event.stopPropagation();// 停止冒泡
        console.log('child click');
    },false)
    </script>
</body>
</html>